Hawaiian Gardens (not the same). That guy sucked.
OK. Maybe the deep half-guard doesn't actually suck. Maybe I'm just hating on it because people are always trying to attack me with it and it's frustrating/annoying. Fortunately for me, I'm not having any of that nonsense. For others (maybe you), it's a nightmare and can be the bane of the 4 minutes of free training their coach allows each night. Don't be that guy. Fight back with ridiculously complex suicide rolls that, on a very low percentage basis, give you the back. Yeah. That's a great idea.
Seriously, this stuff is not easy and is going to take a lot of work. But try it. All the kids are doing it these days. Here are few illustrations of the kind thing we're talking about.
Frazatto (i.e., Mendes Style):
Mendes Style (alt version):